Punch-transfer mechanism for heading machines



A. H. GAESS. PU'NCH TRANSFER MEGHANISIVI FOR HEADING MACHINES. APPLICATION FILED MAY 24, 1921.

spggg y Patented Dec. 5, 1922.

Patented Dee. 5, WZL

annum' n. ennss, or Warneton-Y, CONNECTICUT, AssreNon 'ro rnn n. J; MANvJ-LLE wn'rnnnunv, cONNncrroU'r, A CORPORATION or coN- MAoI-IINE COMPANY, or Nncrrcu'r.

Application fue@ May 2,4,

To `@ZZ cl2/0m t may concern .f

Be it known that l, ALBERT H. GAEss, a citizen of the United States, residing at l/Vaterbury, in the ,county of New Haven and State of Connecticut, have invented 4a new and useful Improvement in `Punch- Transfer- Mechanism for n Heading Ma.- chines, of which the following is a spec. ification. l

In multiple stroke metal heading machines, the stock held bythe dies is operated upon successively by different punches. ylhe punches are `fixed to a vertically movable slide mounted on a horizontally reciprOLGatory gate, the vertical position of the slide on the gate being changed between the forward movements of the gate to bring the several punches into line with the stock.- A machine of this class is illustrated in United States patent to Campbell No. 926,- 170, Junev29, 1909. `In machines of this type means are usually provided for ypreventing damage that would result from lini-k proper adjustment of the parts or from the accidental interposition of vtoreign pieces or vtools between moving and fixed parts of the punch mechanisms. Means of this charAk .acter yare illustrated in United States patent to Gaess No. 1,372,132, March 22, 1921.

The present invention relates to the means provided for preventing such yinjury to these machines, and the object is the construction of a very simple, cheap and effective mechanism for such purpose. Previously safety mechanisms of this nature have hadthe transfer lever, that is positively Operated by a cam,y made in two vsections with. a yielding means arranged -between'and connectingthe sections in such manner that if the rocker arm :that is actuated by thelever for raising and lowering thepunch slide is held from movement for any reason on either the forwird or backward stroke ofthe lever, the connection between the cam operated lever sections will yield and not force a movement of the ,rocker against Ythe obstructiomfas is shown in applicants above mentioned patent. 1in

.artnr orrlic.

PUNCH-TRANSFER MECHANISM FOR HEADING IACHILTES.`

192,1. Serial No. 472,226.

the new form the transfer lever is made in av single piece and the yielding kmeans is carried thereby and arrangedto act be* tween the lever and a part that is connected with the joint between the lever and the rocher' which is Oscillated by the reciprocations of thevlever.

ln the accompanying drawings, yFigure shows a side view of the 'transfer lever and the rocker arm of ya machine .of the type referred to provided with .an inter,- inediate mechanism which embodies, this invention. the saine ywithfportions broken awayfto show the construction. Fig. 3 is a transverse section on the plane indicatedby the dotted lineB-S on Fig. 1.k F ig. ,4 is a longitudinal section of the joint end of the,

lever. i

rlhe transfer lever 1 shown, has a yole 2 at one end that is provided`with ,rolls 3 against which the camruns in the usual manner for reciprocating the lever. yThe lever near the -other end has an opening 4 in which yis placed a still' spiralspring 5 the ends of the spring resting vin recesses in theyend walls of this opening. A portionof the end walls of this `opening on F E2r shows an end view of -oneside are ydesirably cutaway as at `6 for ,I

facilitating. the insertion of the spring. To locate the spring, ywlnchmay be designed to resist a tension of many thousand pounds `in `the large machines, in position, the

spring is compressed and dropped into'the opening. from one side-and then allowed to expand against the bottom of the. recesses in the end walls of the opening. f

The rocherarm,rI is mounted in the `usual `way on the end of the rock shaft 3 and in the free end of the rocker arm is an 'opening 9. ln this opening' is placed trunnion bearing block 10Y This bloei; is adjusted up and down the opening inthe rocker arm by means of screws 11 and 12 and' is clamped in position by anut 13. Extendn ing througha cylindrical opening in this block is the trunnion 14 on the back of the joint kor the connection block 15. The

trunnion yand joint block are retained in place by a washer 16 an l the nut 17 that is screwed on the threaded stem ot the trunnion. The joint block 15 lies in an opening 18 in the end of the transfer lever and is tree to move back and 'forth horizontally along this opening. Extending through the joint block 15 is a spindle 19 that is threaded and provided with nuts 2O and 21 on each side of the joint block. This spindle has a reduced section that extends through the spring and its tip 22 projects into a guiding socket 23 in the lever. Near the tip the spindle is threaded and provided with a nut 24tthat is designed to bear against a collar 25 which is tree to move on the spindle and also tree to move in the end wall of the opening 4l in the lever. On the spindle is a shoulder 26 and movable on the reduced portion ot the spindle adjacent to this shoulder and loosely held in the end wall of the opening 1l' is a collar 27.

In assembling this mechanism the spring is rst setI in the opening, then the spindle is passed through the block 15 and spring until the shoulder 26 on the spindle pushes the collar 27 against the end ot the spring. The nut 241 is then turned up so as to push the collar 25 against the other end of the spring. The tension ot the spring is such that during the normal operation ot the machine it will hold the spindle and joint block so that as the lever is reciprocated the rocker arm will be oscillated to perform the worlt required. lt for any reason owing to false adjustment of any of the parts or thev entry ot any toreign material or it a tool gets in the way and the rocker is held or cannot malte its full stroke, the spring yields so that no part will be broken by the reciprocations of the lever as it is driven by its cam. lllhen the rock arm fails to move backward and the lever is drawn backward, the spring is compressed between the colla-r 25 that is held by the nut 2li on the spindle and the end wall or the recess at the other end of the spring. It' the rocker arm is held so that it cannot move forward and the lever moves forward, the spring is compressed between the collar 27 on the spindle and the end wall ot the recess in the lever at the other end of the spring. In this form ot safety mechanism the lever which forms one element is made as a unitary structure and it carries the spring which forms the second element and also the spindle which forms the third element and is connected with the joint block. lThis construction is simple to manufacture and is eii'ective in operation.

The invention claimed is:

1. A mechanism for operating the punch transfer slide oiE a metal heading machine, comprising a transiter lever, a spiral spring carried by the lever, a spindle loosely mounted in the lever and retained from longitudinal movement by the spring, a rocker arm, and means connecting the rocker arm with said spindle, whereby under normal conditions the reciprocation oi' the lever through the spring reciprocates the spindle and causes theoscillation of the rocker arm, but should the rocker arm be held trom movement so that the spindle cannot reciprocate,

the spring yields and allows the lever to reciprocate independently of the spindle.

2. A mechanism tor operating the punch transfer slide of a metal heading machine, comprising a transfer lever', a. spiral spring mounted in an opening in said lever and thrusting against the ends or" said opening, a spindle loosely mounted in the lever and having enlargements butting against the ends of the spring, a rocker arm, and means connecting the rocker arm with said spindle whereby under normal conditions the recip rocation ot the lever through the spring reciprocates the spindle and causes the oscillation ot the rocker arm but should the rocker arm be held from movement so that the spindle cannot reciprocate, the spring yields and allows the lever to reciprocate independently of the spindle.

3. A mechanism for operating the Lpunch transfer slide ot a metal heading machine, comprising a transfer lever, aI spiral spring mounted in an opening in said lever and thrusting against the ends of said opening, a spindle loosely mounted in the lever and having enlargements butting against the ends of the spring, a joint block movably mounted in an opening in the lever and connected with said spindle, and a rocker arm pivotally connected with said block.

1l. A mechanism for operating the punch transfer slide of a metal heading machine, comprising a transfer lever, a spiral spring mounted in an opening in said lever and thrusting against the ends of said opening, a spindle loosely mounted in the lever, collars mounted on the spindle and' butting againstthe ends ot the spring, a joint block movably mounted in an opening in the lever and connected with said spindle, a rocker arm, a trunnion block mounted in said arm, and a trunnion extending from said joint block through said trunnion block. j

5. mechanism tor operating the kpunch transter slide of a metal heading machine, comprising a transfer lever, a spindle supported by and longitudinally movable independently of the lever, a spiral spring carried by the lever and retaining said spindle from moving relatively to the spindle in both directions under normal conditions, and a rocker arm connected to the spindle.

6. A mechanism for operating the punch transfer slide of al metal heading machine, comprising a transfer lever, a spindle supported by and movable independently of the lever, a spiral spring carried by the lever and retaining said spindle from moving relatively to the spindle in both directions under normal conditions, a rocker arm, and a swivel connection between the rocker arm and the spindle.

7. A mechanism for operating theL punch transfer slide of a metal heading machine,

comprising a transfer lever, a spindle loosely 10 end thrusting against a Wall of the lever and f a collar on the spindle.

ALBERT n. GAESS. 

